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        • KCI등재

          태양열 이용 전화국 기본 설계연구

          한국태양에너지학회(Korean Solar Energy Society) 한국태양에너지학회 1992 한국태양에너지학회 논문집 Vol.12 No.1

          본 연구의 진행은 자연형 태양열 시스템의 검토, 그리고 태양열 냉?난방시스템 분류 및 실태조사, 끝으로 태양열이용전화국 기본설계도면 제시의 순으로 하였다. 그런데, 태양열이용전화국 기본설계는 능률적 업무 흐름에 따른 공간계획 및 시설계획을 수립하여, 그리고 무엇보다도 에너지를 절약함과 동시에 대체에너지중 하나인 태양열을 보다 적극적으로 이용한 건물이 되도록 계획하였다. The present study has been carried out to investigate various passive solar technologies for their possible application to telecommunications office buildings. HVAC systems utilizing the solar energy are analyzed in this regard to elicit the most feasible design. The proposed design is unique, for it has been devised to promote the working spirit with an efficient space planning as well.

        • KCI등재후보

          CFD를 활용한 태양열 공기가열기 내 사각저항체 설치 조건에 따른 열전달 및 압력강하에 관한 연구

          최휘웅,김영복,손창효,윤정인,최광환 한국태양에너지학회 2019 한국태양에너지학회 논문집 Vol.39 No.1

          태양열 공기 가열기의 경우 덕트 내 저항체 설치에 따라 성능에 많은 차이를 보이게 된다. 따라서, 이와 관련된 많은 연구가 진행된 바 있으나 제작이 다소 어려운 흡수판에 저항체를 부착하는 방식을 주로 조사되어왔다. 따라서 본 연구에서는 제작이 용이하면서 상대적으로 설치가 쉬운 사각저항체가 태양열 공기 가열기 공기채널 내 설치된 경우 사각저항체 형상 조건에 따른 열전달 및 압력강하 성능을 전산열유체해석을 통해 확인해보고자 하였다. 그 결과, 열전달 성능은 사각저항체 설치 조건에 따라 최소 1.2배에서 최대 3.32배까지 향상되는 것을 확인할 수 있었다. 반면, 열전달 성능 향상과 함께 압력강하 또한 증가하는 모습을 보였고, 최소 2.8배에서 최대 180배까지 그 값이 증가하는 것을 확인할 수 있었다. 따라서 압력강하 증가 대비 열전달 성능 향상 정도에 대한 평가가 필요하며, 이를 위해 본 연구에서는 성능계수를 이용하였다. 성능 계수의 경우 최대 값 0.828정도를 보였으며, 열전달 성능이 향상될수록 해당 값이 적어지는 것을 알 수 있었다. 즉, 사각저항체 설치 및 형상 변경을 통한 열전달 성능 향상에 이보다 더 큰 압력강하 증가가 수반된다는 것을 확인할 수 있었으며, 향후 실제 태양열 공기가열기 적용을 위한 사각저항체 형상 조건 선정 시 필요 열전달 성능 향상 정도와 허용 압력강하에 대한 추가적인 고려가 수반될 필요가 있을 것으로 사료되었다. The solar air heater has various performances according to an obstacle installed in the air duct. Many studies on thermal performance have been conducted. But many of these studies were using a kind of rib type obstacle attached at the bottom of absorbing plate, but they are so hard to be manufactured. In this study, characteristics of the heat transfer and pressure drop in the solar air heater with various horizontal rectangular obstacles was investigated by CFD(Computational Fluid Dynamics) analysis. As a result, the heat transfer performance was improved from 1.2 to 3.32 times depending on installation conditions of rectangular obstacle. The pressure drop, however, also increased with increment of heat transfer performance from 2.8 to 180 times only by changing installation conditions of rectangular obstacle. Thus, the performance factor presenting the thermal performance enhancement on the same pressure drop was also confirmed. As a result, the highest value of 0.828 as better performance factor was obtained at the lower height of rectangular obstacle and this value has started to decrease with increment of heat transfer performance. In the end, it could be confirmed that the pressure drop was carried higher than the quantity of improvement of the heat transfer performance when the heat transfer performance was increased by change of installation conditions of rectangular obstacle. Both heat transfer enhancement and pressure drop to be required for system need to be considered before the rectangular obstacles are applied to the solar air heater.

        • 소규모 판매시설의 에너지사용현황 및 에너지절약기법에 관한 연구

          윤대원(Dae-Won Yoon),이건호(Keon-Ho Lee),손원득(Won-Tug Son) 한국태양에너지학회 2013 한국태양에너지학회 학술대회논문집 Vol.2013 No.11

          The business shop of large and small sales facilities is rapidly increased. Also making excessive energy demand and emitting carbon dioxide emission is generated. Therefore the purpose of the study is to analyze current energy performance and energy consumption and cost suggest the way to energy saving and of reduction of greenhouse gas in small sales facilities(convenience store) by energy simulation of DOE.

        • 태양에너지에 대한 GIS기반의 자원관리 시스템 개발

          김광득(Kim Kwang-Deuk),정재혁(Jeong Jae-Hyuck),윤창열(Yun Chang-Yeol) 한국태양에너지학회 2006 한국태양에너지학회 학술대회논문집 Vol.- No.-

          The renewable energy information becomes one of the greatest issues all over the world because of serious environment problems and limited fossil resources. The renewable energy resource information system is treated seriously for efficient management and distribution as dealing with these energy problems. Especially, it is difficult to manage and utilize solar energy information because gathering and surveying information is progressed individually in each research equipment. Therefore this paper will establish ISP(Information Strategy Planning) and propose the resource management system based-on GIS to analyze the solar energy and build the integrated management system. The proposed resource management system can provide spatial analysis using thematic map, data search, data import/export and interpolation about users’ queries.

        • 해수냉열원을 이용한 태양열계간축열시스템의 건물냉방 적용에 관한 연구

          김명래(Kim Myung-Rae),윤재옥(Yoon Jae-Ock) 한국태양에너지학회 2009 한국태양에너지학회 학술대회논문집 Vol.2009 No.11월

          Paradigm depending only on fossil fuel for building heat source is rapidly changing. Accelerating the change, as it has been known, is obligation for reducing green house gas coming from use of fossil fuel, i.e. reaction to United Nations Framework Convention on Climate Change. In addition, factors such as high oil price, unstable supply, weapon of petroleum and oil peak, by replacing fossil fuel, contributes to advance of environmental friendly renewable energy which can be continuously reusable. Therefore, current new energy policies, beyond enhancing effectiveness of heat using equipments, are to make best efforts for national competitiveness. Our country supports 11 areas for new renewable energy including sun light, solar heat and wind power. Among those areas, ocean thermal energy specifies tidal power generation using tide of sea, wave and temperature differences, wave power generation and thermal power generation. But heat use of heat source from sea water itself has been excluded as non-utilized energy. In the future, sea water heat source which has not been used so far will be required to be specified as new renewable energy. This research is to survey local heating system in Europe using sea water, central solar heating plants, seasonal thermal energy store and to analyze large scale central solar heating plants in German. Seasonal thermal energy store necessarily need to be equipped with large scale thermal energy store. Currently operating central solar heating system is a effective method which significantly enhances sharing rate of solar heat in a way that stores excessive heat generating in summer and then replenish insufficient heat for winter. Construction cost for this system is primarily dependent on large scale seasonal heat store and this high priced heat store merely plays its role once per year. Since our country is faced with 3 directional sea, active research and development for using sea water heat as cooling and heating heat source is required for seashore villages and building units. This research suggests how to utilize new energy in a way that stores cooling heat of sea water into seasonal thermal energy store when temperature of sea water is its lowest temperature in February based on West Sea and then uses it as cooling heat source when cooling is necessary. Since this method utilizes seasonal thermal energy store from existing central solar heating plant for heating and cooling purpose respectively twice per year maximizing energy efficiency by achieving 2 seasonal thermal energy store, active research and development is necessarily required for the future.

        • KCI등재

          전화국 환경 개선에 관한 연구

          한국태양에너지학회,Korean Solar Energy Society, Korean Solar Energy Society 한국태양에너지학회 1991 한국태양에너지학회 논문집 Vol.11 No.2

          대체에너지 시스템을 적용한 전화국의 건립을 위한 기초연구로써 먼저 우리나라 전화국의 실태 및 선진 일본의 전화국 현황등을 살폈고, 또한 향후 전화국 건물의 발전전망에 대하여 고찰하면서, 대체에너지 시스템의 여러분야에 대하여 검토하였다. This study has been carried out as a groundwork for the application of various solar systems to new telecommunications office buildings. A survey has been done to examine the present conditions of these buildings throughout the country. The exemplar cases of Japan are also studied, which provided useful feedbacks to our needs. The results of the present study could be used in developing the most appropriate(energy efficient) model for these buildings.

        • KCI등재

          자연에너지 복합 이용시스템에 대한 다목적 평가

          배상현(Sang Hyun Bae),이재연(Jae Youn Lee) 한국태양에너지학회 1991 한국태양에너지학회 논문집 Vol.11 No.1

          에너지 소비 구조의 개선을 목적으로 한 자연에너지 이용시스템의 도입이 전력 계통의 계획ㆍ운용에 미치는 영향을 다목적 최적화 방법을 이용하여 평가하는 방법이 논하여 지고 있다. 본 연구에서는 시험 제작한 태양열과 풍력 에너지를 주체로 하는 자연에너지 복합 이용시스템이 특정 지역에 복수 도입되어 지는 경우 전력 통계 운용에 의한 경제성, 안정성, 환경에 대한 영향 평가 방법을 검토하였다. 연구 방법은 대양 지역의 일사 분포와 풍속 분포에 의해서 취득 가능한 에너지를 산정하여 전력 계통 부하의 형상에 미치는 영향을 구하였고, 다음에는 대상 기간에 의한 최적 발전 배분을 결정하여 경제성, 안정성, 환경 지표 등의 평가를 하였다.<br/> 지금까지는 자연에너지 이용시스템의 도입에 대하여 경제적 측면만 논의되었지만, 본 연구에서는 제한된 방법에 의해 안정성과 환경 보전의 영향을 고려한 평가 방법도 가능하다는 것을 나타내었다. Research and development works on practical application of natural energy utilization systems involving solar, wind and sea wave energies are under promoting for the purpose of improving the energy consumption structure. These natural energies, made available with the use of relatively simple apparatus, are clean economically efficient and highly effective in the conservation of environment. However, these natural energies also have low energy density, randomness and regional variations. To compensate for these characteristics, hybrid utilization of solar and wind energies is. currently under study.<br/> The introduction of a plural number of the natural energy hybrid utilization systems into a specific area will affect the economic efficiency, reliability and environmental conservation. Evaluation method of such effects has been examined in this study.<br/> The present method consisted of the steps described below. First, available energy was calculated from insolation distribution and wind velocity distribution in the specified area, and then the effect on the configuration of the power system load was obtatined. This was followed by the determination of the optimal power dispatch over the specified period and by evaluations in light of economic efficiency, reliability and environmental indices.

        • KCI등재

          서울지역 고등학교 건물의 에너지소비특성에 관한 사례분석

          김성범(Kim Sung-Bum),오병칠(Oh Byung-Chil),신우철(Shin U-Cheul) 한국태양에너지학회 2016 한국태양에너지학회 논문집 Vol.36 No.6

          In this study, we analyzed five-year(2011~2015) data for D high school in Seoul area to analyze energy consumption characteristics in high school. The results are summarized as follows. (1) In the result of comparison analysis about 2015 energy consumption by usage, based on primary energy, 18% of energy was consumed in cafeteria, and 82% was consumed in main building. In the case of main building, base and constant load excepting hot water supply in restroom took 40%, heating including freeze protection took 20%, hot water supply in restroom took 14%, and cooling took 8% in order. (2) In the 2015 total energy consumption in D high school based on primary energy, heating energy takes 28%. The range and limit of energy savings coming from the reinforcement of insulation and window performance could be estimated. (3) To introduce new & renewable energy system in high school, electricity-based system is suitable than heat-based system because usage of electric energy is larger than that of heat energy in high school. (4) Five-year energy consumption unit according to heating degree-day showed a linearly increasing trend, and the coefficient of determination(R2) was 0.9763, which means high correlation.

        • KCI등재

          태양열온수기 시공설치

          이성수(Sung Soo Lee) 한국태양에너지학회 1998 한국태양에너지학회 논문집 Vol.18 No.2

          본 고에서는 우리나라 기후조건, 온수사용 패턴 등을 고려한 일반적인 태양열 이용사례를 사용용도에 따라 태양열 온수와 태양열난방시스템으로 구분하여 소개하였다.<br/> 일반적인 태양열온수기의 개념, 구성요소 등을 살펴본 후 각 종류별 작동원리를 소개하였다.<br/> 시공방법에서는 가정용과 산업용으로 구분하여 배관구성도를 포함하여 소개하였고, 설치전여건 파악과 제품운반부터 조립, 배관, 보온, 열매체주입, 설치후 조치까지의 모든 과정을 살펴보았다.<br/> 그리고, 태양열난방시스템의 문제점도 살펴보았다. In this paper, various solar systems are introduced according to usage pattern considering national weather condition and hot water comsumption pattern.<br/> First, basic principle and components of solar hot heater are presented, and then operational machanism of various solar hot water systems are presented according to the case of domestic and industrial use with network of piping.

        • KCI등재

          태양열 냉방 시스템

          백남춘(Nam Choon Beak) 한국태양에너지학회 1998 한국태양에너지학회 논문집 Vol.18 No.2

          본 고에서는 지금까지 연구 개발된 제반 태양열 냉방시스템의 개요 및 원리와 기술현황에 대하여 소개하였다. 소개된 기술은 LiBr-H₂O, H₂O-NH₃, CaCl₂-NH₃을 이용한 태양열 흡수식 냉방시스템; 활성탄, 실리탄, 실리카겔 등을 이용하는 제습냉방(desiccant cooling)시스템; Ranking engine을 이용하는 증기압축식 냉방시스템; Zeolite-H₂O, 실라카겔-H₂O, 실리카겔-메탄을 활성탄-메탄올 등 "고체흡착제-냉매"를 이용한 태양열 흡착식 냉동시스템 등이다. 이들 기술들을 실용화 단계에 있거나 실용화 단계에는 못 미치나 상당한 기술개발이 되어있는 분야이다.<br/> 또한 각 시스템별 비교분석이 가능하도록 대략적인 효율과 장단점이 소개되었다. Four main solar cooling technologies have been developed over the past twenty years are considered in this paper. These technologies include absorption, vapor compression, desiccant, adsorption, etc. All of these solar cooling technologies considered here are solar thermal ones. The destails of the thermodynamic cycle of these solar cooling technologies are given. The general concept of these solar cooling and the relative advantages among them are also presented. At last, the status and outlook for each approach are summarized.

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